Compare software

Updo vs Website Monitor: catalog facts
Updo	Website Monitor
Free Free and open source under the MIT license.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux, Command line	Android
Provides website monitoring from the command line Supports alerting and advanced settings	Supports per-site monitoring intervals Can notify for selected HTTP status codes
Requires command-line use	Available for Android only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.